640 



UNITED STATES NATIONAL MUSEUM BULLETIN 224 



Figures 583-594. — 583, Eucyrtopogon sp. 584, 

 Backomyia livipidipennis Wilcox and Martin. 585, 

 Wilcoxia sp. 586, Leptopteromyia americana 

 Hardy. 587, Eurhabdus zephyreus Aldrich. 588, 

 Schildia microthorax Aldrich. 589, Shannomyio- 



leptus fragilis Carrera. 590, Leptogaster magnt- 

 collis Walker. 591, Leptogaster sp. 592, Brachyr- 

 rhopala Bella White. 593, Itolia maculata Wilcox. 

 594, Taracticus nigrimystaceus Williston. 



